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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /include/linux/iio/common/cros_ec_sensors_core.h | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'include/linux/iio/common/cros_ec_sensors_core.h')
-rw-r--r-- | include/linux/iio/common/cros_ec_sensors_core.h | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/include/linux/iio/common/cros_ec_sensors_core.h b/include/linux/iio/common/cros_ec_sensors_core.h new file mode 100644 index 000000000..e72167b96 --- /dev/null +++ b/include/linux/iio/common/cros_ec_sensors_core.h @@ -0,0 +1,130 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * ChromeOS EC sensor hub + * + * Copyright (C) 2016 Google, Inc + */ + +#ifndef __CROS_EC_SENSORS_CORE_H +#define __CROS_EC_SENSORS_CORE_H + +#include <linux/iio/iio.h> +#include <linux/irqreturn.h> +#include <linux/platform_data/cros_ec_commands.h> +#include <linux/platform_data/cros_ec_proto.h> +#include <linux/platform_data/cros_ec_sensorhub.h> + +enum { + CROS_EC_SENSOR_X, + CROS_EC_SENSOR_Y, + CROS_EC_SENSOR_Z, + CROS_EC_SENSOR_MAX_AXIS, +}; + +/* EC returns sensor values using signed 16 bit registers */ +#define CROS_EC_SENSOR_BITS 16 + +/* + * 4 16 bit channels are allowed. + * Good enough for current sensors, they use up to 3 16 bit vectors. + */ +#define CROS_EC_SAMPLE_SIZE (sizeof(s64) * 2) + +typedef irqreturn_t (*cros_ec_sensors_capture_t)(int irq, void *p); + +/** + * struct cros_ec_sensors_core_state - state data for EC sensors IIO driver + * @ec: cros EC device structure + * @cmd_lock: lock used to prevent simultaneous access to the + * commands. + * @msg: cros EC command structure + * @param: motion sensor parameters structure + * @resp: motion sensor response structure + * @type: type of motion sensor + * @range_updated: True if the range of the sensor has been + * updated. + * @curr_range: If updated, the current range value. + * It will be reapplied at every resume. + * @calib: calibration parameters. Note that trigger + * captured data will always provide the calibrated + * data + * @samples: static array to hold data from a single capture. + * For each channel we need 2 bytes, except for + * the timestamp. The timestamp is always last and + * is always 8-byte aligned. + * @read_ec_sensors_data: function used for accessing sensors values + * @fifo_max_event_count: Size of the EC sensor FIFO + * @frequencies: Table of known available frequencies: + * 0, Min and Max in mHz + */ +struct cros_ec_sensors_core_state { + struct cros_ec_device *ec; + struct mutex cmd_lock; + + struct cros_ec_command *msg; + struct ec_params_motion_sense param; + struct ec_response_motion_sense *resp; + + enum motionsensor_type type; + + bool range_updated; + int curr_range; + + struct calib_data { + s16 offset; + u16 scale; + } calib[CROS_EC_SENSOR_MAX_AXIS]; + s8 sign[CROS_EC_SENSOR_MAX_AXIS]; + u8 samples[CROS_EC_SAMPLE_SIZE] __aligned(8); + + int (*read_ec_sensors_data)(struct iio_dev *indio_dev, + unsigned long scan_mask, s16 *data); + + u32 fifo_max_event_count; + int frequencies[6]; +}; + +int cros_ec_sensors_read_lpc(struct iio_dev *indio_dev, unsigned long scan_mask, + s16 *data); + +int cros_ec_sensors_read_cmd(struct iio_dev *indio_dev, unsigned long scan_mask, + s16 *data); + +struct platform_device; +int cros_ec_sensors_core_init(struct platform_device *pdev, + struct iio_dev *indio_dev, bool physical_device, + cros_ec_sensors_capture_t trigger_capture); + +int cros_ec_sensors_core_register(struct device *dev, + struct iio_dev *indio_dev, + cros_ec_sensorhub_push_data_cb_t push_data); + +irqreturn_t cros_ec_sensors_capture(int irq, void *p); +int cros_ec_sensors_push_data(struct iio_dev *indio_dev, + s16 *data, + s64 timestamp); + +int cros_ec_motion_send_host_cmd(struct cros_ec_sensors_core_state *st, + u16 opt_length); + +int cros_ec_sensors_core_read(struct cros_ec_sensors_core_state *st, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask); + +int cros_ec_sensors_core_read_avail(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + const int **vals, + int *type, + int *length, + long mask); + +int cros_ec_sensors_core_write(struct cros_ec_sensors_core_state *st, + struct iio_chan_spec const *chan, + int val, int val2, long mask); + +extern const struct dev_pm_ops cros_ec_sensors_pm_ops; + +/* List of extended channel specification for all sensors. */ +extern const struct iio_chan_spec_ext_info cros_ec_sensors_ext_info[]; + +#endif /* __CROS_EC_SENSORS_CORE_H */ |